on the bone
• (of meat or fish) having had the bone or bones left in before being cooked, served, or sold.
• "they supply hams in the traditional way, on the bone"
to the bone
• (of a wound) so deep as to expose a person's bone.
• "his thigh had been axed open to the bone"
• used to emphasize that a person has a specified quality in an overwhelming or fundamental way.
• "he's a cop to the bone"